OUTLINE OF CHAPTER THREE 



SOIL IMPROVEMENT 

 General: 



Nature's processes and man's 

 Drainage : 

 Benefits: 



Gives plants more room 

 Makes soil warmer 



Favors processes which produce plant food 

 Makes soil workable earlier 

 Prevents washing 

 Methods : 

 Plowing 

 Surface ditches 

 Underdrains 

 Terraces 

 Irrigation : 

 Methods 

 Advantages 

 Tillage : 

 Benefits: 



Breaks and makes fine the soil 

 Regulates soil moisture 

 Admits air and heat to soil 

 Destroys weeds 

 Tools used 



In preparing land : 



Plow, harrow, roller, etc. 

 In cultivating crop : 



Harrow, cultivator, sweep, hoe, weeders, etc. 

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